cow 



43 



Considerable variation in the leucocytes is reported by different 

 investigators. The normal seems to be from 5,000 to 10,000. A 

 very great variation in the numbers of the several varieties has 

 been found by Dimock and Thompson in apparently normal 

 cattle. 



Further investigation of the blood of normal cattle is needed, 

 especially as to the numbers of the several varieties of leucocytes. 



Table IV. — Summary of Examinations of the Blood of Normal Cattle 

 by Different Investigators 



1 Bulls, 2 oxen, 3 cows, 4 young cattle, b calves. 



Dimock and Thompson obtained the following numbers and 

 percentages of the several varieties of leucocytes in the blood of 

 normal cattle: 



Lymphocytes 2,992 per cmm. 



Large mononuclears 86 



Polymorphs 1,786 



Eosins 772 



Mast cells 31 



Averages 



54.2 



1.4 



30.5 



13 . 15 



0.59 



'.; 



Minimum 



31 % 

 0.2 

 13 



3.8 

 0.1 



Maximum 



76 



3.3 

 45.8 

 26.5 



1.2 



